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CVE-2026-57531

Milkdown before 7.21.3 contains a DOM cross-site scripting vulnerability in the @milkdown/plugin-emoji package that allows unauthenticated attackers to execute arbitrary JavaScript in the host application's origin by causing a victim to paste attacker-controlled content. The parseDOM.getAttrs handler stores raw innerHTML of pasted span elements with data-type="emoji" without sanitization, and the toMarkdown runner subsequently assigns this unsanitized value directly to a live DOM element's inner
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:82ebcc741a254262f64d0fe4b1ab482cd5fcc39867b16c7ffee41cc1d3075c95
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"affected","packageURL":"pkg:github/Milkdown/milkdown","product":"milkdown","repo":"https://github.com/Milkdown/milkdown","vendor":"Milkdown","versions":[{"lessThan":"7.21.3","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/Milkdown/milkdown/commit/db1ae721854a0ab2f188b83cf8695702966640f1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/references/2
{"name":"Pull Request","tags":["issue-tracking","patch"],"url":"https://github.com/Milkdown/milkdown/pull/2410"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/references/1
{"name":"Milkdown 7.21.3 Release Notes","tags":["release-notes","patch"],"url":"https://github.com/Milkdown/milkdown/releases/tag/v7.21.3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/references/0
{"name":"@milkdown/plugin-emoji","tags":["product"],"url":"https://www.npmjs.com/package/@milkdown/plugin-emoji"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/references/3
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/milkdown-dom-xss-via-innerhtml-assignment"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ace80b6265de5df192207df23c6ef8ab2538e82a8c5776457f2cae62c9c027e · sha256:ead289be9c006adb… · /containers/cna/references/4

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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